Abstract: A transmitting apparatus and an operating method for the apparatus in a multimedia system are provided. The operating method includes inputting at least one network layer packet, generating a link layer packet based on the at least one network layer packet, and transmitting the link layer packet. The link layer packet includes a header including information indicating a packet type of the at least one network layer packet, information indicating whether the link layer packet includes a single network layer packet, and information indicating an identifier related to the at least one network layer packet.

Abstract: A method for processing a content by a set-top box according to an embodiment of the present disclosure comprises the steps of: receiving a content including an audio stream; and performing bypassing to output the audio stream to a television (TV) through an output interface without performing a decoding operation for the audio stream, wherein the audio stream includes metadata regarding the content.

Abstract: A transmitting apparatus and an operating method for the apparatus in a multimedia system are provided. The operating method includes inputting at least one network layer packet, generating a link layer packet based on the at least one network layer packet, and transmitting the link layer packet. The link layer packet includes a header including information indicating a packet type of the at least one network layer packet, information indicating whether the link layer packet includes a single network layer packet, and information indicating an identifier related to the at least one network layer packet.

Abstract: A method for providing a broadcast service is provided. The method includes transmitting a user datagram protocol (UDP)/internet protocol (IP) packet including a first message, the first message containing information about a message to be signed and transmitted, and transmitting a moving picture experts group (MPEG) media transport protocol (MMTP) packet including a second message, the second message containing information about the broadcast service and information indicating whether the information about the broadcast service is signed. The first message includes an identifier of a key used to verify a signature of the message to be transmitted and signed and an identifier of a hash algorithm used to calculate a hash value of the message to be transmitted and signed.

Abstract: A method for providing a multimedia service based on unicast, according to the present invention, comprises the steps of: packetizing multimedia data; when a terminal accesses the multimedia service, determining a mode for transmitting the multimedia data to the terminal; generating a signaling message including information on the determined mode, and transmitting the signaling message to the terminal; and transmitting first data among the packetized multimedia data to the terminal on the basis of the determined mode.

Abstract: A method for transmitting media data according to an embodiment of the present disclosure comprises receiving meta data, converting the meta data into a predetermined format corresponding to a bit stream for media data, incorporating the converted meta data into the bit stream, and transmitting the bit stream incorporating the meta data.

Abstract: The present invention relates to a method of playing back a bitstream for transferring a group of pictures, the method comprising the steps of: parsing, when a random access occurs in a first picture, a network abstraction layer (NAL) unit header of at least one second picture following the first picture and determining a NAL unit type of the at least one second picture; removing the at least one second picture from the bitstream on the basis of the determined NAL unit type; and decoding and displaying the bitstream from which the at least one second picture has been removed.

Abstract: A method for determining a network for receiving, by a user terminal, data for a content service, according to an embodiment of the present disclosure, comprises the steps of: receiving the data from a first network; receiving transmission characteristic information of the data for receiving the data from the first network; obtaining network state information of a second network using information included in a packet header of the data; and determining whether to switch the network for receiving the data from the first network to the second network, on the basis of the transmission characteristic information and the second network information.

Abstract: Disclosed is a method by which a multimedia device processes a multimedia packet. To this end, a multimedia packet, which comprises a header including a type information field having type information recorded therein, and a payload including data of a type indicated by the type information, is received, and, when it is recognized that null data is not included in the payload by the type information, the data included in the payload may be processed.

Abstract: The present invention relates to a device and method for transmitting or receiving media resource identification (MRI) information for managing traffic of a service in a communication system. A method for transmitting information associated with content provision in a communication system according to an embodiment of the present invention comprises the steps of: acquiring content configuration information and transmission scheme information for a content; generating media resource identification information including scheduling information and the transmission scheme information according to each content type on the basis of the content configuration information and the transmission scheme information; and transmitting the media resource identification information.

Abstract: Disclosed are a method and an apparatus for transmitting and receiving media-related information in a communication system. The method comprises the steps of: generating a packet header and a packet payload related to media data; and transmitting a packet comprising the packet header and the packet payload, wherein the packet header comprises priority-related information indicating the priority type of the data included in the packet payload.

Abstract: A remote User Interface (UI) providing apparatus and method are provided. To this end, a remote UI server generates a profile ID of a remote UI client, and the remote UI client requests and provides a UI by using the generated profile ID. The remote UI server provides generation information for UI generation to the remote UI client, and the remote UI client generates a UI suitable for the remote UI client by using the provided generation information. Thus, the amount of data processed in the remote UI client or the remote UI server and overhead between the remote UI client and the remote UI server are reduced, thereby quickly providing an apparatus-suitable UI.

Abstract: A method for processing a content by a set-top box according to an embodiment of the present disclosure comprises the steps of: receiving a content including an audio stream; and performing bypassing to output the audio stream to a television (TV) through an output interface without performing a decoding operation for the audio stream, wherein the audio stream includes metadata regarding the content.

Abstract: The present disclosure relates to a method of transmitting multimedia content in a broadcast communication system, and comprises the steps of: identifying protocol information mapped for each service corresponding to multimedia content; transmitting service-related information including the identified protocol information mapped for each service; and transmitting multimedia content corresponding to related services to a receiving side by using the identified protocol.

Abstract: An apparatus and method for controlling a Remote User Interface Server (RUIS) in a Remote User Interface Client (RUIC), wherein the method includes rendering an RUI page for controlling RUISs, receiving an input of a control command for controlling the RUISs from a user through the RUI page, generating a multicast control message for transmitting the input control command in a form of multicast, and transmitting the multicast control message to the RUISs.

Abstract: Methods, apparatuses, and systems for updating a User Interface (UI) in a Remote UI (RUI) client are described. Upon detecting a change in its capability, the RUI client stores a UI state of a UI page and requests a RUI server to update the UI page according to the changed capability. The RUI client receives a UI page updated according to the changed capability from the RUI server, where the stored UI state is reflected in the updated UI page, and the RUI client renders the UI state-reflected updated UI page.

Abstract: Provided are a method and a device for transmitting and receiving multimedia data. The present invention comprises: receiving of multimedia data and confirming of loss data; determining, with respect to the degree of the loss of the received data, of whether or not the lost data can be recovered by means of application layer forward error correction (AL-FEC); if data recovery by means of the AL-FEC is not possible, making of an automatic retransmission request (ARQ) with respect to the lost data; and receiving of data retransmitted with respect to the ARQ and recovering of the lost data.

Abstract: A method for transmitting, by a transmission entity, a packet in a system, according to an embodiment of the present invention, comprises the steps of: transmitting an automatic repeat request (ARQ) configuration (AC) message including ARQ configuration information; receiving an ARQ feedback (AF) message indicating that one or more packets are lost, the AF message including information on a propagation delay for packets to arrive at a receiving entity; identifying a delivery time of the packets between the receiving entity and the transmitting entity based on the propagation delay included in the AF message; and determining whether to transmit one or more lost packets based on the delivery time.

Abstract: A method for managing multimedia data by a contents server comprises the steps of: generating one or more chunks from an input image; generating chunk information of the input image including a list of the generated chunks; performing an identity check among chunks on the basis of the chunk information of the input image and chunk information stored in the contents server; and updating the stored chunk information according to a result of the identity check, wherein the chunks are a meaningful scene unit in an image.

Abstract: The present invention relates to a method and an apparatus for allocating resources in a communication system using an asset delivery characteristics (ADC) message so as to improve efficiency in network resource usage. A method for allocating network resources in a transmission unit of a communication system according to the present invention comprises the steps of: generating an ADC message that includes a parameter value representing a transmission characteristic of a single asset; and transmitting the generated ADC message, wherein the generated ADC message is updated periodically or aperiodically with respect to the asset.